金钥匙

Traditional (Taiwan): 金鑰匙

jīnyàoshi ㄐㄧㄣ ㄧㄠˋ ˙ㄕ

    • method that solves every problem
    • person who holds such a method

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
golden key
Meaning
A method or trick that solves every problem, or the person who holds it.

Sources